zhè / sōu / huò / lún / xià / shuǐ / hòu / yào / xiān / shì / háng / què / rèn / gè / xiàng / shè / bèi / zhèng / cháng

这艘货轮下水后要先试航，确认各项设备正常。

After this freighter is launched, it must undergo sea trials to ensure that all its equipment works properly.